Pulp-beating engine



(No Model.)

J. E. WARREN.

PULP BEATING ENGINE. No. 261,107. Patented July 11, 18

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'to be placed, as usual.

UNITED [STATES PATENT OFFICE.

JOHN E. WARREN, OF CUMBERLAND MILLS, MAINE.

PULP-BEATING ENGINE.

SPECIFTCA'IION' forming part of Letters Patent No. 261,107, dated JulyApplication filed February 15, 1882. (No model.)

To all whom it may concern:

Be it known that I, JOHN E. WARREN, of Cumberland Mills, in the countyof Cumberland and State of Maine, have invented a new and ImprovedPulp-Beating Engine, of which the following is a full, clear, and exactdescription.

My improvements relate to the arrangement and setting of the internalfilling and knives of pulp-beating engines of the class which combine aninternal cone revolving in an outer conical case; and it consists in thenovel features of construction hereinafter set forth and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a longitudinal section of a beating-engine containing myimprovements, and Fig. 2 is a partial horizontal section.

A is the outer conical case of the engine, provided at its ends withheads a a, and having at the smaller end an inlet-opening, I), for thepulp, and at the larger end with an out let, 0.

B is theinner cone, fixed on a shaft, (Z, that passes throughstuffingboxes in the heads a a, and is supported by suitable bearingsthat are attached on the outside of the heads a. The feed and outletopenings and the shaft-bearings are arranged for a horizontal position;butthe engine maybe used vertically by changing those parts. 7

On one end of shaft d the driving-pulley is The other end of the shaftis sustained bya sliding box, 0, and abuts against an adjusting-screw,f, by which the shaft and cone B can be moved endwise to compensate forwear of the knives.

On the inner surface of the case A and outer surface of cone B are steelbars or knives 9. These are arranged on each surface in one or moresections, divided in uniform lengths of the cone, so that each sectionworks against only the corresponding section of the case. The knives areseparated by wooden fillingstrips k, that alternate with the knives, and

both the knives and strips are held by dove tail ribs or segments 2',cast on the cone, and similar ribs bolted on the case. Openings, asshown at Z, are formed in the ribs for the introduction of the knivesand filling-pieces, and keys m are driven into the openings to securethe whole in place.

To obtain the shear action necessary in grinding the stock, the knivesyou the cone B, or on both the cone and case, are set at an inclinationto the plane of the axis. The angle may be more or less, as required,and to obtain bearings for the knives along their whole length thesurface of the cone may be slightly concaved. By the use of straightknives in both the cone and shell set at any required angle with eachother or with the plane of the axis of the revolving cone the shearingaction is obtained; but in all cases the knives are set with suchrelation to the direction of motion of the revolving cone that the endsof the knives nearest the inlet shall meet first, and, the openingformed by the meeting of said knives being toward the outlet, the pulpis driven forward by the action of the knives toward the outlet, and aregular and uniform spiral motion of the pulp through the engine isinduced.

In order to secure economical wear of the knives, those on cone B,whenfirst placed, project beyond the ends of the knives on the casetoward the. larger end of the cone, such projection being lessened asthe cone is set up to compensate for wear. When the limit of wear andadjustment is reached the cone-knives will overlap the case-knives tothe same extent, or nearly so. To insure uniform wear and preventformation of shoulders, the lapping ends are cut away, as shown at 0, onthe lines of wear,and the knives are so graduated in width that when thecone-knives are worn as much as may be they can be removed and placed onthe case, thus economizing the use of steel. The-wooden filling betweenthe knives is cut away as the steel wears down.

I am aware that in paper-pulp engines the cone and shell have heretoforebeen provided with knives detachably secured thereto, and I thereforelay no claim, broadly, to such construction.

Having thus described my invention, I claim combination with theoverlapping cone-knives, as new anddesire to secure byLettersPatcntadjustable endwise, as and for the purpose [0 l. The combination,with the correspondspecified. ing knives g on case and cone, of theseparat- 5 ing-strips h, the ribs 'i, having openings 1, and I the keysm, whereby the knives g may be dc- Witnesses:

tachably secured, as described. FRED. W. ADAMS, 2. The fixed case-knivesg, beveled at 0, in E. B. NEWOOMB.

JNO. E. WARREN.

